202222201021 has 4 divisors (see below), whose sum is σ = 202224208732. Its totient is φ = 202220193312.

The previous prime is 202222201009. The next prime is 202222201033. The reversal of 202222201021 is 120102222202.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (202222201009) and next prime (202222201033).

It can be written as a sum of positive squares in 2 ways, for example, as 197501136921 + 4721064100 = 444411^2 + 68710^2 .

It is a cyclic number.

It is not a de Polignac number, because 202222201021 - 2²³ = 202213812413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202222200986 and 202222201004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202222501021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844320 + ... + 1057033.

It is an arithmetic number, because the mean of its divisors is an integer number (50556052183).

Almost surely, 2^202222201021 is an apocalyptic number.

It is an amenable number.

202222201021 is a deficient number, since it is larger than the sum of its proper divisors (2007711).

202222201021 is a wasteful number, since it uses less digits than its factorization.

202222201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007710.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202222201021 its reverse (120102222202), we get a palindrome (322324423223).

The spelling of 202222201021 in words is "two hundred two billion, two hundred twenty-two million, two hundred one thousand, twenty-one".